Why do vampires do this?

Hopeful it's not bugs. I see that happen, I think it's had to be unlock, no garlic and all household need to sleep somewhere 10pm to 6am without wake up, not single in household wake up during night, so it's better chance vampire should break in and draining sims. If household wake up even other household sleep, it's good chance vampire might not break in, I could be wrong.

I've seen vampires show up outside and then just turn and leave as well. I figure they're like "Oh shoot, they're awake" and realize they came all the way for nothing. xD

I think it was changed that vampires can no longer break in so they just come to the door and hope for an invite and then leave if you don't acknowledge them. People complained too much about it. Garlic is suppose to keep them away. If one of the household sims is a vampire vampires will walk up to the door and immediately turn around and leave.

"Rae357;c-17280752" wrote:
I think it was changed that vampires can no longer break in so they just come to the door and hope for an invite and then leave if you don't acknowledge them. People complained too much about it. Garlic is suppose to keep them away. If one of the household sims is a vampire vampires will walk up to the door and immediately turn around and leave.

No, that was never changed. There was a huge backlash about changing it here on these forums when it was proposed by devs about changing it, and after the backlash SimGuruNinja assured everyone that it would not get changed and remain how it was. The easiest explanation is simply that your Sim was just awake at the time when it happened; I see this happen often especially when living in appts in the dead of night, but usually my Sims are up late all the time anyway and they never get the chance to bite.

That is how my girl got her new boyfriend. I saw him at the door when he realized she was awake. He knocked on the door instead and she asked him in. He did bite her but on a different occasion.

Am inclined to think that the vampire in question did not have the ability to ignore locked doors in cases where sims are sleeping. Having a resident vampire is no guarantee there would not be a break-in. Shortly after the pack came out I had a vampire/human household, a townie vamp came that had the ability, and the resident vampire was not able to intervene - no options to do anything available. Human sim was saved only by a fast use of the instant vampire cheat on her. Have used the 3 layered defense (locked door, garlic farm out front, water slide (they often like those)) since. Have the cheat in reserve for any leakers.